{uint32(TypeObj), "Obj"},
	{uint32(TypeExec), "Exec"},
	{uint32(TypeDylib), "Dylib"},
	{uint32(TypeBundle), "Bundle"},
}

func (t Type) String() string   { return stringName(uint32(t), typeStrings, false) }
func (t Type) GoString() string { return stringName(uint32(t), typeStrings, true) }

// A Cpu is a Mach-O cpu type.
type Cpu uint32

const cpuArch64 = 0x01000000

const (
	Cpu386   Cpu = 7

	EV_CURRENT Version = 1
)

var versionStrings = []intName{
	{0, "EV_NONE"},
	{1, "EV_CURRENT"},
}

func (i Version) String() string   { return stringName(uint32(i), versionStrings, false) }
func (i Version) GoString() string { return stringName(uint32(i), versionStrings, true) }

// Class is found in Header.Ident[EI_CLASS] and Header.Class.
type Class byte

const (
	ELFCLASSNONE Class = 0 /* Unknown class. */

    imag
    (Store {typ.Float64} dst real mem))

// string ops
(StringPtr (StringMake ptr _)) => ptr
(StringLen (StringMake _ len)) => len

(Load <t> ptr mem) && t.IsString() =>
  (StringMake
    (Load <typ.BytePtr> ptr mem)
    (Load <typ.Int>
      (OffPtr <typ.IntPtr> [config.PtrSize] ptr)
      mem))
(Store dst (StringMake ptr len) mem) =>
  (Store {typ.Int}
    (OffPtr <typ.IntPtr> [config.PtrSize] dst)
    len

		v2.AuxInt = int64ToAuxInt(8)
		v2.AddArg(ptr)
		v1.AddArg2(v2, mem)
		v.AddArg2(v0, v1)
		return true
	}
	// match: (Load <t> ptr mem)
	// cond: t.IsString()
	// result: (StringMake (Load <typ.BytePtr> ptr mem) (Load <typ.Int> (OffPtr <typ.IntPtr> [config.PtrSize] ptr) mem))
	for {
		t := v.Type
		ptr := v_0
		mem := v_1
		if !(t.IsString()) {
			break
		}
		v.reset(OpStringMake)

// string ops
// Decomposing StringMake and lowering of StringPtr and StringLen
// happens in a later pass, dec, so that these operations are available
// to other passes for optimizations.
(StringPtr (StringMake (Addr <t> {s} base) _)) => (Addr <t> {s} base)
(StringLen (StringMake _ (Const64 <t> [c]))) => (Const64 <t> [c])
(ConstString {str}) && config.PtrSize == 4 && str == "" =>
  (StringMake (ConstNil) (Const32 <typ.Int> [0]))

	// Complex (part/whole)
	{name: "ComplexMake", argLength: 2}, // arg0=real, arg1=imag
	{name: "ComplexReal", argLength: 1}, // real(arg0)
	{name: "ComplexImag", argLength: 1}, // imag(arg0)

	// Strings
	{name: "StringMake", argLength: 2},                // arg0=ptr, arg1=len
	{name: "StringPtr", argLength: 1, typ: "BytePtr"}, // ptr(arg0)
	{name: "StringLen", argLength: 1, typ: "Int"},     // len(arg0)

	// Interfaces

	b := v.Block
	config := b.Func.Config
	fe := b.Func.fe
	typ := &b.Func.Config.Types
	// match: (ConstString {str})
	// cond: config.PtrSize == 4 && str == ""
	// result: (StringMake (ConstNil) (Const32 <typ.Int> [0]))
	for {
		str := auxToString(v.Aux)
		if !(config.PtrSize == 4 && str == "") {
			break
		}
		v.reset(OpStringMake)

	},
	{
		name:    "ComplexReal",
		argLen:  1,
		generic: true,
	},
	{
		name:    "ComplexImag",
		argLen:  1,
		generic: true,
	},
	{
		name:    "StringMake",
		argLen:  2,
		generic: true,
	},
	{
		name:    "StringPtr",
		argLen:  1,
		generic: true,
	},
	{
		name:    "StringLen",
		argLen:  1,
		generic: true,